Concealed door hinge



Emily 1% 1935. B. G. LEFEVRE 2,003,257

C ONC EALED DOOR H I NGE Filed Feb. 9, 1954 Patented July 16, 1935 Thisinvention relates to hinges designed for automobile doors or forotherpurposes where a pronounced offset or throw-out action is desired.

It is the general objectof my invention. to provide an improved hingefor such purposes, so designed that the initial opening movement of thedoor will be a-simple swinging movement, followed by an abrupt throw-outmovemenbafter the edgeaofthe door'has cleared the door jamb.

A further object of my invention is to provide a hinge by whichsubstantially increased clearance for the open door is effectivelyattained.

V Myv invention further relates to arrangements and combinations ofparts which will be hereinafter described and more particularly pointedout in the appended claims.

-A.preferred.form of the invention is'shown in the drawing, in which 1.i

Fig. l is a plan view of my improved hinge in closed position; t

Fig. 2, is a plan view of the hinge inopen position;

Fig. 3 is-a sectional plan view of the hinge when slightly open; a I VFig. 4.is a side elevation of the open hinge, looking in the directionof the arrow 4 in Fig.2;

Figs. 5, 6, 7- and 8 are perspective views of four of thecomponent partsof the hinge;

Figs. 9, 10" and 11 are plan viewsof modified cam plates, and i i Fig.12 is a detail sectional plan view illustrating any slight modification.

Referring to the drawing, I have shown a hinge comprising hinge platesand 2|, links 22 and 23, a cam plate 24 (Fig. 2), hinge pins 25, 26, 21and 28, and a guide-pin 29.

The hinge plates 20 and 2| are provided with openings to receive screwsor bolts by which the plate 20 may be attached to a supportingstructure, such as the body or pillar post of an automobile, and bywhichthe plate 2| may be attached to the edge of a door or other swingingmember.

The plate 20 is provided with upper and lower bearing portions and 3|,which in turn are provided with spaced bearing openings 32 and 33. Theaxes of these openings are parallel and are preferably located in aplane at a substantial acute angle to the planes of the hinge plate 20,as clearly shown in Figs. 1 and 3.

While this angular relation of the bearing openings is usuallypreferred, it is sometimes desirable to place the openings in a planeforming only a. slight angle, if any, with the hinge plate 20, asindicated in the modified hinge plate 20 shown in Fig. 12.

The hinge plate 2 l is provided with. upper and lower bearing portions40 and 4| at one edge'and with similar bearing portions 42 and at theotheredge, these bearing portions having bear ing openings 44 and 45 forthe hinge pins 21 and 28 respectively. i Thelink 23 has a bearingopening 50 at one edge'and spaced bearing portions at the opposite edge,provided with a bearing opening 5|. The link 22 has a bearing opening 52at one edge and a bearing opening 53 in an opposite edge portion ofreduced length. The cam plate 24 has bearing openings 55 at its oppositeends and isprovided with a cam slot 51, as shown in Fig. 2.

- In. assembling the parts, the hinge pin 25 is passed through thebearing openings 33 in the plate 20 and the bearing opening52 in thelink 22, thus pivotally connecting these parts. The hinge pin 26 isinserted in the bearing openings 32 of. the. plate 20, and in an opening55 at one end of the cam plate24, which: plate 24 swings about the axisof said hinge pin 261 The opposite end of the cam, plate 24 is pivotedto the hinge plate 2| by the hinge pin 28, which is inserted in thebearing openings 45 of the plate 2|. The hinge pin 21 passes through thebearing openings 44 of the plate 2| andthrough the bearing opening. 50of the link 23. The links 22 and 23 are connected by the guide pin 29,which extends through the bearing openings 5| and 53 andhasaclosefriction fit'in one of these members. pin 29 extends through theslot 51 in the cam. plate 24, as shown in Figs. 2 and 4.

From this description, it will be evident that the hinge pin 28 mustalways move in the arc of a circle about the axis of the hinge pin 26 asa center, while the links 22 and 23 act as a toggle to project the hingepin 21 outward, the action of the toggle being controlled bythe guidepin 29 and the cam slot 51.

In the operation of my improved hinge, the initial opening movement is asimple swinging movement about the axis of the hinge pin 26. As soon,however, as the edge of the door clears the door jamb, and as soon asthe cam plate 24 has simultaneously moved slightly to the right, asindicated in Fig. 3, the guide pin 29 controlled by the cam slot 51tends to straighten the toggle formed by the links 22 and 23, and thusefiects' a rapid throw-out movement of the hinge pin 21, while the hingepin 28 swings about the fixed axis of the pin 26. v

-TED TATES PATENT oF cE.

The upper end of the guide The hinge plate 2| is thus moved quickly tothe position shown in Fig. 2, in'which position the hinge plate 2| isvery substantially offset away from the hinge plate 20 and from theouter surface of the body or other part to which the plate 20 issecured.

The guide pin 29, by engagement with the inner end of the slot 51 (Fig.2) constitutes a stop to define the open position of the hinge.

In Figs. 9, 10 and 1171 have'shown additional cam hinge plates 24 24 and24 respectively, in which cam slots 60, El and 62 of'modified positionor outline are provided. By thus varying the.

outline and angular position of the cam slot, the offset or throw-outmovement controlled as desired.

It will be noted that substantially allof the weight of the door; iscarried. :bythe hinge links 22 and 23, and that little if any weightiscarried by the cam plate 24 which is provided solely for directingthe-movement ,of the guide :pinl:29.=

This type of concealed door hinge is particularly-,vdesirablelwhereathciouter surface of ithe :b'ody adjacent the .hinge ,iS": provided;with .a zsu'bstane tially= projecting. bead; or molding, or" in: caseswhere ,a' pair of spaced hingesjare -us.ed;onaa =body having ,asurfaceoutwardly curved between the points where the hinges areattacheda Having thus-described my invcntion;and:.the advantagesthereof, I do 7 not wish-Ito be; limited to the details hereindisclosed; otherwise than as r set forth in theclaimsbut whatl'claimishel; 'A-con cealeddoor-hinge comprising "awhinge plate to henattache'd to,a supporting; :p'art; ayhin'ge plate :to'be attachedv to: a swingingpart, alwpair of toggle linkseach'having-eone; end pivotally- 0011+nected -to one ofgsaid: plates,za projecting; guide pinpivotallygconnecting; the: opppsitezends; of said links together; and a,cam rlplate ipivotedsat each endto one of said'hingeiplatemsaidicamplatezhaving; 8;:(38LII1fS1OUjiI1l30 which :the project-ing end of saidguide pin extends, and. said -;cam .s1ot and 1 guide spin therebycontrolling the opening and closing movementssofls'aidlswingmg hingeplate;

2; A ,concealedzdoonhinge xcomprisingza ihinge plate to beattached'toassupporting partga hinge Plate stoabie attached topar swinginggpart; apair of togglelinks seach; having; one end pivotally connected to one ofsaid rplates, an projecting guide pin pivotally;connectingazthe,loppositeeends ofsaid links .togetlier;andrzai-nam platev pivoted at,eachendtoone-of .saidhinge. plates; said cam maybetimed: and I platehaving a cam slot into which the projecting end of said guide pinextends, and said cam slot and guide pin thereby controlling the open?-ing and closing movements of said swinging hinge plate and providing astop to limit such opening movement.

3. A- concealed door hinge comprising a hinge plate to be attached to asupporting part, a hinge plate to be attached to a swinging part, a pairof toggle links each having Que-end pivotally connected to one of saidplates; a-Vpg-ojecting guide pin pivotally' connecting the opposite endsof said links together, and a cam plate pivoted at slot and guide pinthereby controlling the openlin'giandlclosing movements of said swinginghinge plate, said toggle links supporting substantially the entireswinging load and said cam plate having substantiallyajdirectionaliunction only;

4-: A concealed door, hingexcomprising lalzfirst hinge pla-te,;to beattached to: a-zsupporting part, atrsecond hinge plate to be attached to.a swinging part, a pairofr: toggle rlinkswpivotally con:- nectedtogether and also connecting one ndI'Of said seeond hinge*plateetolsaidfirst hingeplate, and 5a ;cam'.plate connecting the-opposite endof said'secondehinge'plate tosaid first hinge plate, said cam plate havingacam'slot therein and said toggle links having an element projectingfromttheir point of; pivotal connection and: co operating.--with said.cam slot to controlzithe-actionnof said. toggle links. as saidfhinge isopened enclosed; I i

hinge :plate' to be attached-to a supporting-apart,

l l 5. A concealed door hinge zcomprising aiinrst V a second hinge plateto be attached to'a swing' I ing part, a pair of toggle lin-ks'-pivotallyxoonnected together and also connecting one endofsaid'secondhingeplate to said first hinge plate; and

